trunc, truncf, truncl - round to integer, toward zero
double trunc(double x);
float truncf(float x);
long double truncl(long double x);
Link with -lm.
Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
trunc(), truncf(), truncl():
_POSIX_C_SOURCE >= 200112L
These functions round x to the nearest integer value that is not larger
in magnitude than x.
These functions return the rounded integer value, in floating format.
If x is integral, infinite, or NaN, x itself is
These functions first appeared in glibc in version 2.1.
For an explanation of the terms used in this section, see attributes(7).
C99, POSIX.1-2001, POSIX.1-2008.
The integral value returned by these functions may be too large to store in an
integer type (int, long, etc.). To avoid an overflow, which will
produce undefined results, an application should perform a range check on the
returned value before assigning it to an integer type.
This page is part of release 5.02 of the Linux man-pages project. A
description of the project, information about reporting bugs, and the latest
version of this page, can be found at https://www.kernel.org/doc/man-pages/.
|trunc (), truncf (), truncl ()